BIGBearing SuperTorque 210ftlb (OEM 125) Billet PTO Clutch 917-04180 5219-52 5218-6 for Cub Cadet 1.125" GT2186 GT2523 GT2550 GT2554 LT2042 1863 1864 2086 2176 2185 2186 2206 2284 2518 Mower HD Switch

What It Is

This is a heavy-duty, billet electric PTO (Power Take-Off) clutch, delivering 210 ft-lbs of torque. It engages the mower deck blades on Cub Cadet garden tractors with a 1.125" crankshaft, designed for high-torque or commercial-grade cutting.

Fitment & Compatibility

• Crankshaft diameter: Must be 1.125" (not 1" or 1.25"). Measure your crankshaft end or check your engine model (typically Kohler or Kawasaki twins on these Cub Cadets).
• OEM cross numbers: Replaces OEM 917-04180, 5219-52, 5218-6. Also fits Cub Cadet part 759-3514A, 759-3514.
• Fits these Cub Cadet models: GT2186, GT2523, GT2550, GT2554, LT2042, 1863, 1864, 2086, 2176, 2185, 2186, 2206, 2284, 2518. Also fits some HD Switch series mowers.
• Deck size: Works with 48", 50", 54", and 60" decks on these tractors—no deck-specific mods needed.
• Wiring: 2-wire connector, standard 12V DC. Check your harness plug shape; some older Cub Cadets may need a pigtail adapter.

Key Things to Know

• Billet vs. stamped: This is machined from solid aluminum, not stamped steel. More durable under heavy use, less prone to warping or cracking.
• Installation difficulty: Moderate. You’ll need a puller (3-jaw or similar) to remove the old clutch from the crankshaft, plus a torque wrench to tighten the center bolt to spec (~50-60 ft-lbs). No special electrical skills required.
• Common gotcha: The air gap between the rotor and armature must be set to 0.012–0.015" using a feeler gauge after installation. Many skip this and get intermittent engagement or premature wear.
• Torque rating: 210 ft-lbs is overkill for stock 42" decks but necessary for heavy 54-60" decks or thick grass. Won’t slip under load.

Should You Buy It

If you’ve got a compatible Cub Cadet garden tractor with a 1.125" crank and you’re tired of weak or failing OEM clutches on larger decks, this billet unit is a solid upgrade. It’s priced competitively with stamped aftermarket clutches but offers noticeably better heat dissipation and torque capacity. Best for owners cutting 2+ acres or using a 54-60" deck.